#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>

#define DHTPIN 15
#define DHTTYPE DHT22

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";
const int mqtt_port = 1883;
const char* topic = "stayhub/dht22";

WiFiClient espClient;
PubSubClient client(espClient);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Conectando WiFi...");
  }
  Serial.println("WiFi conectado");

  client.setServer(mqtt_server, mqtt_port);

  while (!client.connected()) {
    Serial.println("Conectando a MQTT...");
    if (client.connect("esp32-wokwi")) {
      Serial.println("MQTT conectado.");
    } else {
      delay(1000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    client.connect("esp32-wokwi");
  }

  float temp = dht.readTemperature();
  if (!isnan(temp)) {
    String tempStr = String(temp, 2);
    client.publish(topic, tempStr.c_str());
    Serial.println("Temperatura enviada: " + tempStr + " °C");
  } else {
    Serial.println("Error al leer el sensor DHT22");
  }

  delay(5000);
}